Seat and back rest for a chair



FIG. 1 is a perspective view showing the top, left side and front of a seat and back rest for a chair which form my new design, the broken lines in this and other figures showing other parts of the chair being for illustrative purposes only and forming no part of my design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a top plan view.

The short broken lines shown on the seat and back rest in FIGS. 1 through 6 are understood to represent stitching. 

The ornamental design for a seat and back rest for a chair, as shown and described. 